We're dividing 471591 by 18 
The aim is to understand the frequency of 18 in 471591.

Moving on to step 1:
The number 18 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 18

Advancing to step 2:
18 can be fit into 47 2 times, resulting in a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 11 after subtracting 36 from 47.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 18

Going ahead to step 3:
If we divide 111 by 18, we get 6 and a remainder of 3.
The next digit of our result is 6. 
Result so far: 26.0
Deduct 108 from 111 and we're left with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 18

Moving on to step 4:
When dividing 35 by 18, we get 1 with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 261.0
If we subtract 18 from 35, we get 17.
Include the next digit (9) from the dividend after 17, then repeat: 179 / 18

Let's proceed to step 5:
The number 18 fits into 179 9 times, leaving a remainder of 17.
The next digit of our result is 9. 
Result so far: 2619.0
Subtracting 162 from 179 leaves us with 17.
Append the next digit (1) from the dividend to 17 and continue with: 171 / 18

Going ahead to step 6:
18 can be fit into 171 9 times, resulting in a remainder of 9.
The next digit of our result is 9. 
Result so far: 26199.0
If we take 162 away from 171, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
18 can be fit into 90 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 26199.5
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 18 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 26199.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
When dividing 0 by 18, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 26199.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 26199.5, with a leftover of 0.0.